CVE-2025-71234 [High] | Out-of-bounds Write in Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add The driver does not set hw->sta_data_size, which causes mac80211 to allocate insufficient space for driver private station data in __sta_info_alloc(). When rtl8xxxu_sta_add() accesses members of struct rtl8xxxu_sta_info through sta->drv_priv, this results in a slab-out-of-bounds write. KASAN report on RISC-V (VisionFive 2) with RTL8192EU adapter: BUG: KASAN: slab-out-of-bounds in rtl8xxxu_sta_add+0x31c/0x346 Write of size 8 at addr ffffffd6d3e9ae88 by task kworker/u16:0/12 Set hw->sta_data_size to sizeof(struct rtl8xxxu_sta_info) during probe, similar to how hw->vif_data_size is configured. This ensures mac80211 allocates sufficient space for the driver's per-station private data. Tested on StarFive VisionFive 2 v1.2A board.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	0.02%	0.12%	+0.10%
2	2026-02-19	—	0.02%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

0.02%

0.12%

+0.10%

2026-02-19

—

0.02%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.8	3.1	HIGH	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H` Click to expand Attack vector (AV:L) They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:L) A normal user session is enough; they don’t have to be admin. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:H) They could widely tamper with or forge data—trust in the data is badly hurt. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	1.8	5.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.8

3.1

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand

Attack vector (AV:L): They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L): A normal user session is enough; they don’t have to be admin.
User interaction (UI:N): Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U): Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H): Serious risk that confidential data gets exposed in a big way.
Integrity (I:H): They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

1.8

5.9

[email protected]

OS Trackers for CVE-2025-71234

vendor	priority	summary	link
`debian`	unimportant	CVE-2025-71234 unimportant priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2025-71234
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2025-71234
`suse`	high	CVE-2025-71234 severity important: SUSE including 425 source package names (2.1.3-6.124:kernel-default-base-6.4.0-40.1.21.17, 2.1.3-7.105:kernel-default-6.4.0-40.1, …), 747 product×package rows across 61 product lines (Container suse/sl-micro/6.0/base-os-container, Container suse/sl-micro/6.0/kvm-os-container, … (61 product lines)): Fixed 312, Known Affected 231, Known Not Affected 142, Will Not Fix 37, First Fixed 25.	https://www.suse.com/security/cve/CVE-2025-71234/
`ubuntu`	medium	CVE-2025-71234 medium priority: Ubuntu including 157 source packages (linux, linux-allwinner-5.19, …), 1256 status rows across 8 suites (bionic, focal, jammy, noble, questing, trusty, upstream, xenial): DNE 871, ignored 169, not-affected 112, released 83, needed 21.	https://ubuntu.com/security/CVE-2025-71234

Affected software / configurations for CVE-2025-71234

Vendor	Product	Version	Raw CPE
linux	linux_kernel	>= 6.9, < 6.12.72	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.13, < 6.18.11	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	>= 6.19, < 6.19.1	cpe:2.3:o:linux:linux_kernel::::::::

References for CVE-2025-71234

URL	Tags
https://git.kernel.org/stable/c/116f7bd8160c6b37d1c6939385abf90f6f6ed2f5	Patch
https://git.kernel.org/stable/c/5d810ba377eddee95d30766d360a14efbb3d1872	Patch
https://git.kernel.org/stable/c/86c946bcc00f6390ef65e9614ae60a9377e454f8	Patch
https://git.kernel.org/stable/c/9a0f3fa6ecd0c9c32dbc367a57482bbf7c7d25bf	Patch

URL

CVE-2025-71234 | wifi: rtl8xxxu: fix slab-out-of-bounds in rtl8xxxu_sta_add

Exploit prediction scoring system (EPSS) score for CVE-2025-71234

Common vulnerability scoring system (CVSS) metrics for CVE-2025-71234

Weakness enumeration for CVE-2025-71234

OS Trackers for CVE-2025-71234

Affected software / configurations for CVE-2025-71234

References for CVE-2025-71234